Expanding cylinder grinder



-Mar. 3, 1925. 1,528,653

' w. R. BUTLER EXPANDING CYLINDER GRINDER Filed Nov" 20, 1920 wrvzeg/ Patented Mar. 3,

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Application fledliovember a0, 1920. Serial Ne. 42,1481

hereby declare the following to be a full,

clear, and exact description, such as will enable others skilled in the art to which it ap ertains to make and use the same.

he ob'ects of this invention are to provide a grinding tool for enlarging the cylinders of explosion and other reciprocating engines to adapt them to receive over-sized pistons.

The invention is particularly adapted for fitting over old and worn cylinders to adapt them to use with slightly larger pistons, thus preserving the life of the cylinder, which would otherwise have to be thrown awa The invention comprises a longitudinally split cylindrical grinding shell, which is provided withmeans for holding abrasive.

material, such as carborundum powder or eme It includes means for holding the cylinder and rotating it when in use, and also means for expanding the parts and for locking the same in adjusted ositions.

It includes resihent means for retaining the shell parts in assembled position, and

shown in the accompanying for drawing them tightly against the adjusting. means.

The invention is hereinafter described drawings, and. specifically pointed out 1n e claims.

In the accompanyin drawings, Fig. 1 is a vertical longitudina section of the device; Fig. 2 is a side elevation thereof; Fig. 3 is a lan thereof.-

In t ese views, A is a longitudinally split cylindrical grinding shell, and the sectional parts are held together so that they can be introdu ced into the cylinder by means of circular springs, B, B inserted in the circumferential grooves, (5, C

Abrasive material, such as carborundum wder or eme is enclosed in surfacev p grooves or recesses, D, D, in the sections. The sections are provided with transverse partitions, E, E, in conical openings, F, in which the conical 3 reader, F, is positioned, This is adjusted y means of a screw threaded central longitudinal shaft, G. This shaft is'enclosed in a sleeve, H, to which handles, 1, I, are -attached, by means of a pipe union, J.

The central rod is secured within the sleeve, H, by means of the terminal nut, K, which is further secured by means of a pin,

vL, so that it can not become loose and when the conical spreader is adjusted upon the rod, G, the'entire tool can be rotated to grind the inner walls of the cylinder by turning the handles, I, I.

" The rod, G, can be rotatedat any time to adjust the conicalspreader in the cylindrical shell by using a wrench upon the vnut, K. The sleeve sections, after adjustment, are clamped tightly to the sleeve, H, by means of the disc, M, which is attached by screw threads, M, and a set screw, N, rigidly to the lower end of the sleeve, H, and engages a shoulder, 0, formed on the inner faces of the flanges, P, P, upon the sections of the shell, A. q A clamping ring, Q, is forced down upon the outer faces of these flanges b means of the 'nut,'R, having a ring-shaped andle, R, the parts being in this manner immovably secured together, and turn together when the handles'are turned.

Having described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a tool for theur ose described, in combination, a longitu ina ly split grinding cylinder, provided with spaced horizontal partitions and an inwardly extending flange at one end, said partitions 'eachprovided with a central conical opening, ,a conical spreader in said openings, resilient means for retaining said shell sections in' place, a

passes, handles for sai nut for securing said screw to said sleeve .at their outer ends, a disc on the lower end of said sleeve engaging the inner side ofv said flanlge on said shell, and a clamping ring an nut on said sleeve above sai flange.

k 2. A lapping-intool, comprising a pair of relatlvely movable supportmg mem of said members, a sectional cylinder suported upon one of said supporting memrs, coacting means supported upon the other of said supporting members for eners "a handle alfixed to one of said members, an .adjusting means associated with the other larging the effective diameter of saidbcylinder, and locking means for holding said parts in adjust-ed position.

3. A lappingdn tool, comprising a tubular stem, a handle affixed to the upper end thereof, a supporting plate secured to the opposite end thereof, a rod rotatably mounted within said tubular stem, an upwardly tapered member adjustably mounted upon said rod, a plurality of cylinder sections mounted adjacent said tapered memher and having integral parts bearing thereon, flanges upon said cylinder sections and adapted to rest upon said supportmg plate,

and clamping means for locking said flanges 15 upon said plate.

In testimony whereof, I hereunto set my hand this 23 day of October, 1920.

WILLIAM ROBERT BUTLER. In presence of JOSEPH DEEUBE, WM. M- MONROE. 

